Urban solid waste incineration process nitrogen oxide soft measurement method based on modular neural network

Abstract

The invention discloses an urban solid waste incineration process nitrogen oxide soft measurement method based on a modular neural network, and belongs to the field of solid waste treatment. The emission of NOx can be effectively controlled through real-time detection of toxic gas-nitrogen oxide (NOx) generated in MSWI. In an industrial field, a high-precision instrument-flue gas emission continuous monitoring system is adopted to detect the NOx concentration in flue gas emission, the measurement result is greatly influenced by the environment, and the equipment maintenance cost is high. The method comprises the steps that firstly, task decomposition is conducted through a fuzzy c-means algorithm, and a task is decomposed into different sub-tasks; secondly,for different sub-tasks, soft measurement sub-models designed by adopting a radial basis function neural network, and a nonlinear relationship between a characteristic variable and NOx is established; and finally, sub-network output is integrated through the cascaded neural network. The effectiveness of the proposed method is verified by adopting a reference experiment and actual data of a certain MSWI factory.

Description

technical field [0001] The invention belongs to the field of solid waste treatment. Background technique [0002] With the development of social economy and the continuous improvement of people's living standards, municipal solid waste (Municipal solid wastes, MSW) is increasing at a global annual growth rate of 8%, which has a great impact on the ecological environment. MSW incineration (MSWincineration, MSWI) is one of the more commonly used solid waste treatment methods at present. It can not only achieve solid waste volume reduction, but also "turn waste into treasure". Nitrogen oxides (NOx, mainly including NO and NO 2 ) is one of the typical emissions in MSWI tail gas, and it is also the main component of environmental pollution. The NOx concentration in my country's MSWI tail gas is higher than that of some EU countries. Therefore, it is particularly important to reduce NOx emissions in MSWI tail gas. At present, the main method of controlling NOx emissions is to r...

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Problems solved by technology

The incineration process of municipal solid waste involves complex physical and chemical reactions. The NOx concentration is related to many process variables such as the composition of the waste entering the furnace, the temperature in the furnace, and the air volume. Moreover, the working conditions in the furnace are changeable during the incineration process, and it is difficult to establish an accurate software with a single neural network. measurement model

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